What do you mean by "first time"? Do you mean "first time" having sex or do you mean "first time" using a cock ring? If it's someone's first time having sex, personally, I'd want to do that "naturally", without anything added to the experience. The first time is special. If you mean it's their first time using a cock ring, I don't see why this wouldn't be a good first one. It's cheap and simple.

Also, make sure that when you make a thread, you post it in the right forum. This forum is for vibrator-related threads only, hence the title. This thread belongs in the "Penis Rings and Pumps" forum.